Put Infill configuration in Slic3r interface.
After I load model, before slicing, I do press Configuration button and configure Print setting only for choice Infill options (Fill density, fill pattern - for exemple, I print test model and I don't want use many plastic for it), then I must save configuration with some name. But I don't need many configurations names in list for print settings for each my configuration of densitis and patterns. I ask put some important configusations (Infill) separatelly from print settings menu. Becouse some options in print settings in technical, but speed, infill - this is important for quality of printing.